Power transmission chain



H. G.- KELLER POWER TRANSMISSION CHAIN Sept. 21, 1943.,

M w M W d K a w. W a 4 m p 1, 1943. H. G. KELLER 2,330,058

POWER TRANSMISSION CHAIN Filed July 20, 1942 4 Sheets-Sheet 3 A; 19 @3 1a 3 I 23 40 1925 I 29 40 26 a l u I I1 I {1 H m I l I 27 Q I WERE] l i w m I H I I 3 32 .11 35 gjwumkm 36 as 37 as 17810 3 61591101 toothed faces of the op'posed wheels.

Patented Sept. 21, 1943 UNITED STATES OFFICE rowan TRANSMISSION origin Henry G. .Keller, Glenside,- Pa.; assignorto Link- Belt Company, a corporation oflllinois Application July 20, 1942, Serial No. 451,615

' Claims. I (01. 74-245 This invention relates to new and useful improvements in power transmission chainsof the V-type in which packs of slats are employed to .provide side engagement with the toothed faces of opposed conical wheels, and dealsmore pa1'-,;

- ticularly with the meshing action of such chains.

- Power transmission chains of the side engaging, slat pack type are conventionallyemployed in infinitely variable speed transmission units of the type that includes expansible and contract--10 ible V-pulleys, or pairs of opposedconical wheels,

mounted on parallel driver and driven shafts.

Thev opposed wheels of each pair are adjustable toward and away iromeach other to vary their Each chain. link consists of a series, of parallel link plates centrally cut away to provide acommon I transverse opening to receive a cage or frame enclosing a slat pack. The cage or frame is held against movement relatlvetoitschain link. The slat pack is made up of a series of relatively thin, elongated slats or platesQwhich are of substantially rectangular formation in side elevation. The several slats of each pack are ar-" ranged in direct side surface contact with each other and extend transversely of the chain. link through the bore of the cage or frame. Theslats of a pack lie in planes which are substantially normal to the center'line'of their link andv thereby normal to the direction of travel of the chain while approaching and depart ing from a pulley.

The slats are of greater length than the cage or rame so as to project beyond both ends of the latter., They are permitted to shiftlongitudinally' 40 relative to each other in opposite directions. This shifting or displacement of the individualslats transversely of the chain. is required to permit the pack to adapt itself .to the contours of the Conventional .v pulleys have the teeth of opposite wheel faces staggered relative to each other so that eachetoothof one face is opposite a tooth space of the other face. Each tooth and tooth space tapers inwardly and has its center 50.

line arranged truly radially of the wheel. The teeth and spaces are of uniform depth throughout their lengths. The opposite sides of each tooth are beveled to provide entrance clearance for the slats. The depth ofeach beveled tooth will belapparent, therefore, that the lines which define each beveled tooth side are parallel with each other. but are not parallel with the truly radial centerline of the. tooth.

,Due to the difierent effective'diameters which canbe provided with contractible and expansible V-pulleys, the tangent points for the approach andhdepartureruns of the chain will naturally occupy different circumferential positions with respect tothe top and bottom dead centerlines ofthe wheel. When the two pulleysof a transmission unit are conditioned toprovide a 11-1 ratio drive, the eiiective diametersfof both pulleys will be the same and all tangent points. for

both pulleys willsubstantially [coincide with the dead centerlines of the pulleys. An y departure from af ll ratio drive, however, causes thettan- I gent points'forithe pulley having the larger effective diameter. to be arrangedon thezapproach and departure sidesrespectivelyfof the top and bottom dead center lines'while the tangent points for the other pulley, which has the smaller effectivediameter, will be arranged between said dead center lines. I I I I I I I As the ends of the various chain link slat packs mustbe fully meshed with the tooth and tooth spaces of the opposed wheelsjofboth pulleys while traveling betweenthejapproach and} departure tangent points, meshing'must be accomplished in advance of the approach tangent point while unmeshing must be accomplished after leavingthe departuretangent point.

Meshingandunmeshing of the ends of the slat packs "with'the tooth and tooth, spaces of the, opposed wheel faces occur during movement of v I the pack endsradiallyof thewheels. -This radial movement of the pack endsandthe. carnniing action produced by the conical faces and the beveled sides of; the teeth during meshing bring about the necessary transverse displacement or shifting ofthe slats to -adapt the packs to the contour of the tooth and tooth spaces of'flthe .wheelifaces.

.1 w be to the non-radial'arrangement of the tooth sides and the possible locations of the tangent points relative to the top andbottomgdead center lines of the wheels that the individual slat ends are 'angularly arrang ed with respect to the tooth 'sidesduring theaforesaid' radial meshing: and unmeshing movements of the packs. This angulararrangernent must necessarily offer resistance or interference to the meshing and unmeshi ti .J. i i v i" "de'is constant throughout its radial length. It

apparent from the above reference I Further, the overall dimensions, or thickness, of a slat pack in the direction of travel of the chain is such that each pack meshes with a circumferentially extending wheel area that is equal to at least the combined width of one tooth and one tooth space. Therefore, the meshing and unmeshing of each pack must be progressive in the direction of. its thickness or travel, starting with theileadingesiat.

The 'resistance'oninterferencerduring"meshing and unmeshing offered by the normal angular position of the slat ends with respect to the tooth sides as well as the progressive Lmeshing and unmeshing of the individual packs impose certain operational limitations iontthisztyperof transmission unit which are improvable." IFor example, meshing and unmeshingiinterferences determine the permissible drive ratio variations which can be provided. They are in .nart"re gsponsiblefor, certain structuralfailures caused in operation.moreparticularlyduring starting, they contribute. noise and uneven actionparticularly lllhenoperatin at low speeds.

It is'the primary object noiithisiinvention'to providepower transrr'lisison chainsof the .side en a n sl t pa typ whichwiil effect greater ease of meshing and unme'shing.

Ajfurtherimportant object of the invention is the, provisiono'f power tran mission chainsof the side en aginghslaopack type which .will ,provide asuhstantialre'duction' in',.the resistancekor' inter- .ference. developed .during. meshing and unmeshing of '.the 'slat packs with the tooth .and'tooth -sp ces-oi thepulleywheels.

.iAnother primary-object of: theimention .is to provide .aslat pacl, ,.-.side en aging.- nower1transmission chain in which the emeshing .and .unmeshing .of. the. slatnnackawith, theltootheid. wheel faces ,vmavfflbe delayed :50 that .each ,pack may .move substantially as ea .unit .into .and out 40f -seating engagement .with the .wheel .Ifaces and thereby (preventing .interierence .in any ,or .all .packs, that would "develop with conventional chains.

-Other objects .and advanta es .of the-invenjtion w ll be. anparentnurins the cours i of .the liollowing description. V

;In the accompanying drawingsfcrming apart of this specification .and in which. like numerals .areemplqyedtodesignate likepartsthmughout Lthesame,

Figure 1 isa. sidesorlfaceelevational viewuof. a

toothed conical ,nulley wheel .with a. ,slat ,pa typ of power transmission chain Joperatively associated therewith, F .Figure is.afra mentarysectional View. of-a pair of opposed conical ,wheels having .toothed iacesand .with .-a slat pack .type v.of.transmissicn -onein .1:rieshingtherewith.

Fi ure}isasschematic.viewhfiatoothed pulley wheel with a powergtransmission -chain .of .the .slat ,pack .ty'ne renown oneratively associated therewith in three difierent positions Whichare intended toillustrate .the meant and minimum. effectivediameters .which can -be provided.

Figure .4 shows.a.-.development. of a v pulley .withits onn sed=toothed .wheels shown in section, and with one if orm oof ,vn wer .transmission Figure 6 is a transverse, vertical sectional view taken on line 6-6 of Fig. 5,

Figure 7 is a longitudinal vertical sectional view taken on line of Fig. 6,

Figure 8 is a 'detail side elevational view of a modified form of side engaging, slat pack type of power transmission chain.

Figure 9 is a transverse verti ita'lste'n :on; line"9-9 ofcFigIS,

Figure 'l-0 -is a longitudinal vertical sectional view taken on line l0-l0 of Fig. 9,

Figure 11 is a longitudinal, vertical sectional .view.taken,on line Il-H of Fig. 9,

Figure'12 is a detail plan view of a form of aafiorm:ofaspringeemployed with the type of link illustrated inl-Figs. 8 to 11 inclusive for yieldably cal sectional view .mai-ntaining -thesslat pack cage in its normal position,

:FigureLalB is a detail side elevational view of a further modified form of side engaging,.slat pack .ffiypeeof power transmission chain,

Figure 114 is a transverse vertical :sectional nevi/taken on line rue-r4 of' Fig. 13, ,and lFigidre 15 is a longitudinal, vertical sectional ,viewItaken on'line 15-45. of Fig..'l.4.

In ,the .drawings, wherein "for the purpose of illustration are shown the preferred embodi- .ments of this invention, and ifirst particularly referrin ',to'iFi s.il;.2 and 4; thereferenceycharvacter L6 ,is employed "for generally designating .eachone ofI/the' two jconical wheels which. collectively -.f0rm ,a '.V;pulley.,of the expansible and. .contractible tyne: ,COneor .both of the wheels .jshownjn Figs.j2. an'd"4sare adapted-to be slidab1y.mounte'd. onithe .shaft. If! so that the toothed faces. l8 ,df;theewheels maybe *movedjtoward, and away'from each other to vary'theelfectivefdiameter ofthe pulley. I

flhepconicaliface ,Qfcach oneof these wheels isffiormed.withlthe,radiallteethiilwhich.are sepaatedby thdtoothrspaceslm. ,TheteethlS of the opposed wheels .arestageered with ,respect to each .Qthel, as shown iniEigs. '2 and. .4. That is t .say, theiteeth; l 9 of ,0nevwhee1. are. oppositely .chain of the;sideaengacinaslanpack ,typeoperatively rassociated athereiirith .an-d ..-illustrated -.in plan,

-.Fi-gure :5 is .a detail-side .elevational view .of one link of the chain illustrated in EH04.

arran ed .to .the -tooth..sp.aces '20 .df. the other wheel. The tooth and .tooth spaces of both wheels are tapered. radiallyinwardly. The center lines of the teeth ,and of .the ,tooth spaces, ..as represented by the;lines' 2 Lan'clZZ .respectviely in F .alte'truly..rauiallyarranged. .The teeth i9 and .the tooth spaces 20,are.,.of constant ,or.,uniform "depth throu houttheiriradial length. .The onpositessifdes ,23 of .theteeth arebeveled as is learly. shown. in.1=.'igs. 1, ;2.=and .4. These: beveled slides are of uniiornLdepth .throughoutrthe. length ofeachtooth. iThisconstant bevel of. tooth sides provides ,an entrance clearance for .theslats. "Because the depth ,ofthebevelor side 23 is. con- .stan .for each .Ltooth, throughout the radial length ,of .the teeth, .the .lines which .define .the bevelefdlsi'des .23 are parallel wltheachiother .but ;they are not .trulyradialllarranged .with respectto their res peotivewheel.

Becausetheopposefd wheels of a ,V-puley arc contractible and .expansible, -the effective .diam- ,eter of;the,pulley may .be varied. The schematic .showin of 3 illustratesa,transmissionchain ,in three (different positions which represent the .maximmn we'lfective .diameter .A, the mean effective diameter .3 and -.the.m1nimum eifective diameter-,0. sOf course, ,pulleys .of this infinitely .Variable hype .of .transmission unit can be ror-tated,-in-.either. direction. For the. sake. of clear- .ness and isimpl-icity, .itiwill m (considered that direction ofthe. arrow :2423 .With the wheel. ro-

tating inithe directionhofgthisf arrow line, the approach side for; the; chain will. be designated by: the reference; character D'Whil the departure {side ,wilL bear-designated by the reference wharacter For each efiectiv'e diameter'of; a pulley; the tangentvpoints-for both the approach side Dnand-vthe departure side E:will occupy similar circumferentialipositions with-respect to the -top;.and bottomideadcenter lines of the wheel. 1Thettop'ldead.jcenteriline is designated in Figs. ;1 and 3.:by the referencecharacter-G. The bottom dead center lineais idesignated'in each one Y of these two figures iby the reference characterH.'..s*,1' m 1" v1 .7

: The tangent: points foithelchain when it occupiestherimaximum efiective diameter position i A will be; at the intersections of. the s radial lines .J;andthercenter lines L of the'chain on the approachand departure sides .D and E' respective- ,ly. i ltwill-be noted that these tangent points lie gonfthe approach andrdeparturesides ofthe top -and;' bottom dead center lines G and H respectively for thisnraximum; effective diameter A.

;';The two tangent points for-the mean effective diameter Bigarelocated atthe points of inter section between the. radial lines K; and the cen- -ter linesLof :the chain. It will be noted that the radial nes K coincide withgthe top and bottom 1 dead c enter -lines G and H respectively; For the minimum r effective -dian' eter C, the tangent points for both runs ,ofthe chainwill lie at the points vof ;intersection between :the radial; lines e center linesrofthe chain runs-L. jI hese.tangent pointsdare both positioned between the top and bottom deadcenter lines'G andiI-I respectively 1 e A completecyclej of motionconsists of the approach, where any interference of the leading edge of; slat pack will oscillate thejp-aok to a substantiallyradial position after-which thevchain ,link rotates about. the slat pack which continues its seating until the point of. approach tangency is reached, "Fromapproach to departure tanigency, no ,rnotion fof= slat I pack occurs within the t chain,

pack may remain'substantiall'y radial ,until unmeshedsufliciently to prevent resistance unineshingg. I

he fully meshedwith the/teeth and .the tooth spaces of the pulley lwheel s while traveling between the approach'tangentpoint and the dcparture tangent point. (Therefore, meshing of the ends ofthe. slat packs must be accomplished in'advance of the approach tangent point while 'unmeshing must be accomplished after leaving the departure tangent point.

Since full mesh must'be accomplished on anchain preach. also full unme'sh on' departure, of from tangent points respectively; and, since the slat packs have their individual slats arrangedin planes '[L of the runs of the chain, there is considerable adjustment or change required in shifting the individual slats beyond their normal positions in order to mesh 'with the changing angles preisentedl by the teethvof the'wheel fac s. Further-- more, the tooth sides and "slat sections are not, "at the first contact of chain and tooth face, in an advantageous position toj cause the desired movement. Hence resistance to easy movement tends to p e interference; C oser to tangency the differencesinangularity of tooth sides flheslat packsfor the various substantiallyfnormal to the center lines a the individual slats ,of each pack nay' occupy 40 c ain, link consists of a series of parallel link [Beyond departure tangency the slat I to .in v't-t invsidesl; all:

pa le -21b, is the primary;; urp. q q isaim packs with; ;their rrespectiveichain links so that :radial positions; of thesides =23 ofgthewhee tface t th w enst ies t pa s are q ci tog mes andsme -v. Becauseth ats o h ck pe mitte to s um t es in s tion th r c seat as a, unit; thereby -eliminating.the -interfere ence encountered ,i-n the prqgressive meshing and unmeshing of =conventional chains;

; Fig-J11 illustrates thechain in the mean effective diameter position B ptEig. 3. "Figs l and 3 elinks-Pi th fo a are b en hifted-0r. cillated out 'of their normal positions so that-the planes of the individual slatspt-these packs-will be; substantially paralleljwith the lines that-g define thebeveled sides '23 of the wheel teethh- Be- 1 I a se h s at siy ac s urina e h and m h na ma s tit s tantiall o ncide with the anglesof the tooth sides, Avery iittleresistance and, 'no interference is offered during h na d un i -mi 5"; Referring inext to Figs. 1 and 4 v it will be seen plates 21. The plates of adjacent linhs are over lapped at their associated ends to accommodate the chain pins 26. The series of link plates 21 for each linkzarecentrally cut; away to provide a common, transverse opening 28 to,;receive a cage or-frame 29; :Each, cage orefram -.-tubul arformation and has arranged, therein ua a lo are capable of shitting oribeing displaced transslat. packs opening 28 of each linkssandits associated cage -or -frame 29 that the cage or frame is permitted 1 to 1 partake .of limited oscillatory movement :with vrespect-to its -link. :j- Figs. 1, land-,4 to 7 inclusive illustrate one embodiment 'ofthe invention; which accomplishes this desired-result. Figs. 8 to n 12 inclusive illustrate one modified form of the invention WhiIe'Fig-s. .13 to ;1 5 inclusive illustrate anothermodification. :Although the forms of the invention shown in Figs. 8-to.- -15,inclusive-are .notillustrated inassembly views of the character of Figsl and-4, it is to be.understood;that

v plainedl these Figs.,8;to. i5 modifications may; be substituted for the form illustratedfin the assembly viewsa .ZIhedetail structural .fea tures of each embodiment oi the invention now {will be I e5;-

. First referring to Flash tol 4 and slat, 7 sections ,is progressively reduced until at the point, of tangencythey; :are;substantially of the slats of cach -pack v i may; meshror seatas azunit andunmesh or un-' elates, tl'i'er efore, hbid no if! "springs H6.

c0 slat pack 30.

or Fig =1. It 'will be appreciated tliat the mower constmied in oscillating -the link eages' wwill be store'd up :theiapfingdeavs: and will be 'giv'en' up again as theflexeu leaves itre lpermitted to return to their normal, -un'fiex'ed co'nditio'ns.

The form I of l the invention 's'ho'wn in Figs. 8 to 12 inclusive i's Werysimilar to the form shown in the spreceding figures; Each link cplate 2f! is provided with a centralwpenihg 28 *that is -oi 'elong ated fcrmation -1ength'wise*of "the Cplate. Each of such openings is provided "with an areuate end "bearing surface -3l that is adapted'tb cooperate with a shorter hearing surface 32 formed on'thecage orlframe 19.. l 1 7 z In i this embodiment of Fthe invention, 'however, the intermediate link plates; that is, all o'ftlie -li-nk plates 2! withithe' exception pf the two 'ex'trerne' si'de :plates; are provided "with additional arc'uate bearing surfaces 41 tha't ar-e adapted to cooperate with the arcuate cuter bearing surfaces 42 of the rocker strips "43 tha't zre spot Weldedat 44 to the in ner end "'oliter sides 'f the "cage-Z9. 'lhe'va'rioiis b'ar'ing s'uriaees-3l," 2; -and'42 ai'e alk struck frdm a cofnln'on akis fi ahd the cagewillbs'cfllate ab ut this sins;

nigur-e-iz eiscioses a spring 4 $vvhi'his 'forme'd from afsditahle strand of s'prin'g-fsteel'wire. In plain, tl iiss'p'ringtakes the shape 'df a fi'gur'e eight. FrgJQ "d scloses tw 'df these 'sp'ri'ngs We beingu'sed with a liiik. The lirikplatestli'at cooperate-with these two wire 's'pringsare illut'r'a'ted in-'F"ig'.1'0as having clearance openings 41 f or'md therin through'vihih'the'endstrands -46a of the springs are permitted toi 'mbve. The intermediate nort-ion i'B a: each spring i's prdheny seated in the j edge; portion -'4 Sl'o'f the aSsoiatH linkopening 28. Stop shoiilder's sohoope'rate with the end strarids 46a of thespring for deterniiiilng tlie normal position of the s it na ho-age is. f p

M The extrern'e side iinkplates "are i llustra'tedin pig. 8. The openings 28 "for'thslinkplates are "contractedjat j5l so that the'y wi11 overlie [the "oppositeendsof the'rockerstrips 43'an'dfthe olit'r si'des oftheintrniediate p'or'ti n' as tor the {Wire This type (if oscillatabl'e cagefa'nd 's1at pack will iunction'in thes'a memanner 'as that describ'edfor the 'preceding embodiment 6f the invention, t 1 Z The form oftheln'venticn shown hiFi' 's13fto 15 inclusive differs substantially from the'precedingembodiments'o f the invention. Inthisform, each link pla'te'is provided witha circular Opening 28a. Theca'g'e or framezflafis of cylindrical formation. Therefore, the entire circumference cooperates with"the--'entire edge area of each link'plateopeningfna'for providing an oscillating bearing 'forfthe cage. "The opposite side walls'of thecagea're provided v'rithopenings 52 to accommodate theend portions df-the A lip 53 is formed about, a substantial portion of each side opening52 fornthe purpose of providing -a-.greater-contat'area between the various slats of the .pack and thecage. To yieldab ly hold the cageits normal position, a steel spring leaf 54 isprovided. IThe-en'd portions of this'leaf spring are seated in notches 55 formed in certain ones of the intermediate chain link plates. Abutment fingers 56 are struck up from the nperipheral wall of the cylindrical 'cage 29crla'nd'bearagainsttheintermediate portion of the leaf spring 54. Oscillatory movement 'of the cage 29a in opposite directions"is limited by engagement or the abutment suifa'ces"51,formed oh the age, "with the end ortions "or itheie'df "s'p'ring'54.

a Thistyipe of springpe'rforms the added function ofzlimiting transverse. displacement of the cage: 29a relative to its link opening. .It will be, seen that thelongitudinal edges of the leaf spring will engage edges 58iormed on the cage 29a as a result of striking up the abutments 56. Additionally, the end'portions of the leaf spring 54 will engage side surfaces of the adjacent link platesl'l which are not provided with thenotches the leaf spring ends.-

Thismodified form of chain link and oscillatory 55 to receive slat pack and cage will function in the same: manner as the embodiments of the invention disclosed-in the preceding'figures. Therefore, no

further description-oi the mode of operation of this link'construotion need be provided, g

It is to be understood that r the forms of this invention herewith shownand described-areto be taken 'as preferred examples of the same, and that various changes I in the sliap'effisiz'e; and arrangement of parts 'inay 'b resorted to without depart- 111g. ofthe subjoine'd'claims;

iH 1-. In a'power transmission chain, a-plurality of links pivotally connected by chain pins, acage' from the spirit of the invention or the scope thus 'describedjthe invention, reia'im'z member for each chain link, means for connecting each cage member tofitslinkso as to permit the cage memberfto partake-of limited oscillatory movementswrelativeto the link and about-the transverse axis of the link, and a packof slatsmounted in each cage verse movement.

member for limited transl'inksfpivotallyconnected by chain pins, eachlink f2; In power transmissionchain', a plurality'of being centrally cut away to provide a'transversei opening, a 'cage'member positionedin each'trans-' verse opening, the cross'sectional shape of each transverse opening and itsjjcajge being such that: the cage ispermitted to partake 'of'limited DSC11121.- torymovements"relative to the link, and a pack "of slatsjmounted in each'jca'ge' member ior limited irai' ll rs di a em n -I Ina powe'rtransmi'ssion chain, a pluralitybf links pivotally connected'by chain pins'fa cage member for each chain link, means, for connect ing'jeaphcage member to its link so as to'p'e'rmit transverse displacement. .1. 1 a

. 6. In. a power transmission sectional shape .of each .-transverseopening. and its cagexbeing such that, thecage is permitted to partake. of .limited oscillatorymovements;rela-..1 tive .to. the. link,, bearing. means .operatively. as-.. sociated with each cage-.andits link forsupport-e ing...the cage for; oscillatory movementyandwa packbfsl'ats mounted .in each cage" limited transverse displacementm;

,7. In a power transmission chain; a plurality of links, each one. of. which. is formed of ags'et of' parallel link-plates,-ithe-.end portions of thellinki; plates of adjacent sets being overlapped .andi.-pivotally connected ';-by.. chainv .pins, the .set of plates of;;each link ;beingr centrally. cut; away; to provide and a pack; of slats mounted inv each cage mem'-- her :for llimited, transverse; displacement. .1.

1 ,8: sIn a .power transmission; chain,. a plurality: of links, each one of which. is:.formed' of a-set of. parallel link. plates, theiend portions :of 1 thelink platesof adjacent sets xbeingloverlapped.,andpiv-. otallyconnected by chainpin's; the setof platesof each link being centrally-cut.awaytdprovide a common'transverse opening; a cagememberpositioned in each transverse :..-opening the. 1 cross sectional shape; of .each itransverse. opening and its cage, being such. .thatpthe cage. is permitted v topartakeof limited os'eillatoryrmovements relathe cage member; to partake of limited "oscillatory" movements relative toi the link and abolit the transverse axis ofth'e link, apack of slats mount ed ,in each cage l'me'mber -for".liinited transverse movement, andspring means for yieldably holdmgeaeh a' em'as normalpositiom j, e I

Q 4. lnfa power tra smission chain, a, plurality of l n s. i al yn ctq by chain Pi s ac link being centrally cut away toprovide a trans-' verse openingla cage member. positioned in each transverse opening, the: cross sectional shape v of each transverse opening and its cagebeing such thatt a is Perm t t tak 1 91 oscillatory movements relative to the link, a pack" oi slatsimonnted in each cage member tor lim ited transverse displacement, and spring means for. yi d .1 es fiil g;'$1 a lmV m of each .cage relative to, its link and for restoring the cage to itsinormal position after movementthereofu i r H 5e- Ina power transmission chain, a plural ty 'of links 'pivotally connected by chain pins,-; each link being centrally cut awaytoprovideatrana.

verse-opening, acage member positioned in each transverse opening, the 'crosssectional shape of each transverse opening and its cage being such that the cage is-permitted to partake of limited tive to the .link-,;;bearing means operatively associated .with each cage and. its linkfor supporting the cage for woscillatory movement, means,

operativiely associated ..with:each: cage-and its:

link for preventing transverse displacement I of the cage in thelinkopening, and apack of slats mounted in eachcage member for limitedtrans versedisplacement. a

9. In apoweritransmission chain, a plurality of links, ,eachrone. of which. is formed ofaset .ofparallel linkplates, the end portions of the link: plates of adjacent sets being overlappedand =.pivotally;connectedby chain pins, the set of plates of each link being centrally cut away" to provide a common transverseopening, a cage member positioned in. each transverse opening, the cross sectionalshape of each transverseopem. ing and its cage being such that the cage is permitted to #partake .of limited -oscillatory=move-' mentsrelative to the link, bearing means operatively associated witheach cage and its link for supportingthe cage for oscillatory' movement, a.

pack of slats mounted' in each" cage member "forlimited --transversedisplacement; and spring means-- for I yieldably resisting oscillatory move ment-of ea'ch cage-' -relative to its link and for restoring the cage 'to its movement-thereof.

. 1'0.'-'In a power transmissionichain,a

member for .2

normal position after of each link being. centrallycut awayitoiprovide.

a common transverse opening, a. cageimember. positioned in. each transverse. opening, the. cross sectional; shape. of each transverseiopening. andi its cage being such that the cage. is; permittedi of: the. link. while. meshed; andi duringemeshing and-iiunmeshing'. movements; of: the; pack, which; correspondi with the; anglea formed: byi the teeth: of the; wheels-andsaidi linkccenter. line; .andaspringi means yieldablye resisting;suclnrelativamovement.

between.eachicageiandiitslinke .4. n a p el ansmission chaim. 31;, nluralitw ofzlinks; eacnaonaci whicliiia forirnedaoiraisetiofr Parallel link; plates; the end: po tions of 1 he: links to partakeof-limitedoscillatormmovementsrelax plates of adjacent sets being overlappedgandmintive to the link,.meansoperativem: assoeiatedi with. each. cageand-its. link for preventingtranse' verse displacement. of. the cageinthe link pen'i-J ing, a pack of. slats, mounted ineach cagemem her. for limited transverse.- displacement andt spring means for. yieldably resisting oscillatocm movement of. each cage. relative. to itslink; and: for restoring. thecageto its normalipositioniaftera movement thereof. 7 t r 11. .In. a power; transmission chain, a, plurality of links, each. one, of:v which. is formed of; at set of: parallel. link plates, the. end portions ofi theilink platesof, adJ' aqentcsets, beingoverlapped-and'zpim- L otally.; connectedtby, chainr pins, the; set on plates;

acommon .transverse'opening, .a cage imemhen-pn-.-

' sitiened. in, each transverse. opening, the-cross;

ofeachlinkbeing: centrallyicut awayttoiprovid'ei 25: be. p

tallmconnectedzbyi chain nine. tl e setsiofz plat of; each, in nbeinei-central s lihawayr oinw idei a commonvtransve se neninetwhichi s el n etedi in! theidirectie of; hezl nethrqfi t e-. i ln mi st 16; ma idem with .e euate. and be r neg li iap s hat.

are struc fa'omi hetr nste sea .5 i... ubu ar, ase nemben; stendiasmthrmshi at ransve s neniize ,seidi ease members eeahi beene;- f,;-.Q sated.fe meiieni ni saesyersesemen;

2m nd; having: pa ate-heather l ut eeea 09p hemise the; marine te nem; he ime qneeineet a seiiiea i e at aqi-fiaehi eaagbe nqi of less circumferential length than the heaping, uria e i j t ielieleoneiimewherebmm'cazemll winemaker at. im teqi c lla q eQF e wi hi eep ei ei hei lnls an lt 'fiz llfit iiinh he: here h a m arq nitsel iansv rseideee ee emit 5:- m pw an m ssion he iianlu alitr,

partake-0t limited oscillatory movementsirelativei of li nlks eachone oi which is f orrnegi o La,set.,c,

tor the. link,. bearingumeansvcperativelyi associated? with; each. cage. and. its link. fon supporting .the: cageior oscillatory movement, means operativelya associated with. each. cage sand. its link: for z. pre= thelink, opening, .a packet-slats. mounted; inleach Ca e .memben for limited transverse displacement; and; spring, means for. yieldably resisting os cilla; tory movement.v of each. cage relative, to Zitsdink;

andiqr restoring the cage. to its normalapositioni 4m ited transyer In aitermovement thereon.

13. In apower transmissionchain, 'arplurality. of) links, each..one..of. -.which'. is formed chase-1t; of, parallel link, plates, theend. portions... oiethes link. plates of adjacent, setsbeingioverlappeflsandi pivntally. connected .by. chain pms a. cagei'memhen foneacn chainclink, acpack. of. slatsitransversely d-spiaceamy .mountednn each cage member. and. promoting. beyond: QDDOSit8;;Sides; of tneirt-linkr for meshing. with the iradialteeth formed: onzthei faces... of. opposed conical. wheelsof; a; vspulleyi while traveling therearound; and. means ioricon-r netting, each cage member to.) its. chain .link;for-. relative movement about an axisarrangedtranss verse ytqf thelink tapermitthezslatmto assume the difierent angular. positions :with respectito the center. line. ,of the..link, while-meshed andiduring meshing.. and :unmeshing. movements. oi thin-pack; w ic correspond i with the. angles; formed; .by .the teeth of the wheels and ,said link. CEI'ItEPIiHE-x 13, In a, power. transmission; chain,.a ;plural ity of 1 links, each one. of which ,is.formed. .oI asst-oi parallel. linkplates,v the. end portions of :theJink plates of adjacent sets being. overlapped and ply:- otally connected; byv chain pins, a. cageimembfi ioreachchain link, a pack.oftslatsitr nsversely disp aceab y mounted in each age. member; and projecting beyond opposite sides of, their; link forz mesh n w ththe adia th formed on the fates 45 qtally connect "pennants; aestwe n ,manag ments nlaiesi taqlee at seta eine-qv r eep a ndniigotally connected by chain pins, theglhonplates at aelink i ineieenaalla wt m mnrb i venting transverse; displacement, of: the. cage in a cornrnon transyegee opening qi circulan iorina ion-in. Cre s emen a aeeimemnep o i'mulan emin ne: n. I eet om un arttdi ach. reefs -er en nen eeg tl z. s illafietyl ovements nd arnepheil lai .ei m dlin. e iilmemb a pn lw pres nt." a 1 iIiQ eFJ- IeE QQSZ nt l a iigaipiural tit il. a ll 5 1am; Q I AQQ. Qfj a e orparanl'nnk-pmes' ndnonpnsniitne.11m: lat si. ts entsetshe e1 2d'enq"r i b p ns;t esetoiiplates Q ut wa opnroyide.

i'ansyeis n n l W,direeiiea i he enetni i. W rea m d:- t scya el ndi erine ria estnet fis rii si ur eees w ich n herbeehesg yr eeespii li mls ee ieeitne e i r ses oi'i ash vca e;Jhiii t: i less; umi re itie heath.than. he e ne' m' r s' her in h i as z e; 0 partake of =limited oscillatory move mppnted in' the bore Off each *cage member for limited transverse movementg andfspring' means for; yieldaply resisting oscillatbry movements oi each cagerelative tojtglinlewf I ITS-Ina power transmission ohain; aaplurallty of links; each one of qwhioh is formed ofiaa set of parallel link --plates;- the-.end portions iof rtlre'l link plates of adjacent sets being overlapped andaptvg ot ally -connecte'dibyichainsapinsg thenset ofigplates 0t. opp sed-coni al whee si t-a, e-nu l yi While 0 -eaclr1linkiibeimggcentrallmcutzawfiy itpgiggyielg travel ng therearound,. means foiyconnectingeaqh cagemember to its a chain link ion relative movement about anaxisarranged transverselyegal se link to permit the slats to assumeitheidifierenl; angulan positions withirespect to. the center: line a.commonttransverseaopfinim flfiz iiw filiml tiom ins crossisenti mi.an h ezmimi bfihi a, formatiomwini crossases iqn npnsat d-e ee eeh transverse; opening i013; soillate meosees nss limited transverse movement, and spring means for yieldably resisting oscillatory movements of extent of oscillatory movements of the cage, and a pack of slats mounted in the case for limited transverse displacement. I, p

; 20. In a power transmission chain of the side engaging, slat pack type, a chain link'centrally.

cut away to provide a transverse opening,acage journaled in said transverse opening for oscillatory movements, means for limiting the extent of oscillatory movement of the cage, spring means for yieldably resisting ,oscillatory'movee ments of the cage relative to the link, and a pack of slats mounted in the cage for limited transverse displacement. i

HENRY G. KELLER. 

